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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#ifdef HAVE_IO_H
# include <io.h> /* for isatty() */
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h> /* for isatty() */
#endif
#include "jsapi.h"
#include "js/CharacterEncoding.h"
#include "js/CompilationAndEvaluation.h" // JS::Compile{,Utf8File}
#include "js/PropertyAndElement.h" // JS_DefineFunctions, JS_DefineProperty, JS_GetProperty
#include "js/PropertySpec.h"
#include "js/RealmOptions.h"
#include "js/SourceText.h" // JS::Source{Ownership,Text}
#include "xpcpublic.h"
#include "XPCShellEnvironment.h"
#include "mozilla/Utf8.h" // mozilla::Utf8Unit
#include "mozilla/dom/AutoEntryScript.h"
#include "mozilla/dom/ScriptSettings.h"
#include "nsIPrincipal.h"
#include "nsIScriptSecurityManager.h"
#include "nsIXPConnect.h"
#include "nsServiceManagerUtils.h"
#include "nsJSUtils.h"
#include "BackstagePass.h"
#include "TestShellChild.h"
using mozilla::dom::AutoEntryScript;
using mozilla::dom::AutoJSAPI;
using mozilla::ipc::XPCShellEnvironment;
using namespace JS;
namespace {
static const char kDefaultRuntimeScriptFilename[] = "xpcshell.js";
inline XPCShellEnvironment* Environment(JS::Handle<JSObject*> global) {
AutoJSAPI jsapi;
if (!jsapi.Init(global)) {
return nullptr;
}
JSContext* cx = jsapi.cx();
Rooted<Value> v(cx);
if (!JS_GetProperty(cx, global, "__XPCShellEnvironment", &v) ||
!v.get().isDouble()) {
return nullptr;
}
return static_cast<XPCShellEnvironment*>(v.get().toPrivate());
}
static bool Print(JSContext* cx, unsigned argc, JS::Value* vp) {
JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
for (unsigned i = 0; i < args.length(); i++) {
JS::Rooted<JSString*> str(cx, JS::ToString(cx, args[i]));
if (!str) return false;
JS::UniqueChars bytes = JS_EncodeStringToUTF8(cx, str);
if (!bytes) return false;
fprintf(stdout, "%s%s", i ? " " : "", bytes.get());
fflush(stdout);
}
fputc('\n', stdout);
args.rval().setUndefined();
return true;
}
static bool GetLine(char* bufp, FILE* file, const char* prompt) {
char line[256];
fputs(prompt, stdout);
fflush(stdout);
if (!fgets(line, sizeof line, file)) return false;
strcpy(bufp, line);
return true;
}
static bool Dump(JSContext* cx, unsigned argc, JS::Value* vp) {
JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
if (!args.length()) return true;
JS::Rooted<JSString*> str(cx, JS::ToString(cx, args[0]));
if (!str) return false;
JS::UniqueChars bytes = JS_EncodeStringToUTF8(cx, str);
if (!bytes) return false;
fputs(bytes.get(), stdout);
fflush(stdout);
return true;
}
static bool Load(JSContext* cx, unsigned argc, JS::Value* vp) {
JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
JS::RootedObject thisObject(cx);
if (!args.computeThis(cx, &thisObject)) return false;
if (!JS_IsGlobalObject(thisObject)) {
JS_ReportErrorASCII(cx, "Trying to load() into a non-global object");
return false;
}
for (unsigned i = 0; i < args.length(); i++) {
JS::Rooted<JSString*> str(cx, JS::ToString(cx, args[i]));
if (!str) {
return false;
}
JS::UniqueChars filename = JS_EncodeStringToUTF8(cx, str);
if (!filename) {
return false;
}
JS::CompileOptions options(cx);
JS::Rooted<JSScript*> script(
cx, JS::CompileUtf8Path(cx, options, filename.get()));
if (!script) {
return false;
}
if (!JS_ExecuteScript(cx, script)) {
return false;
}
}
args.rval().setUndefined();
return true;
}
static bool Quit(JSContext* cx, unsigned argc, JS::Value* vp) {
Rooted<JSObject*> global(cx, JS::CurrentGlobalOrNull(cx));
XPCShellEnvironment* env = Environment(global);
env->SetIsQuitting();
return false;
}
static bool DumpXPC(JSContext* cx, unsigned argc, JS::Value* vp) {
JS::CallArgs args = CallArgsFromVp(argc, vp);
uint16_t depth = 2;
if (args.length() > 0) {
if (!JS::ToUint16(cx, args[0], &depth)) return false;
}
nsCOMPtr<nsIXPConnect> xpc = nsIXPConnect::XPConnect();
if (xpc) xpc->DebugDump(int16_t(depth));
args.rval().setUndefined();
return true;
}
static bool GC(JSContext* cx, unsigned argc, JS::Value* vp) {
JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
JS_GC(cx);
args.rval().setUndefined();
return true;
}
#ifdef JS_GC_ZEAL
static bool GCZeal(JSContext* cx, unsigned argc, JS::Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
uint32_t zeal;
if (!ToUint32(cx, args.get(0), &zeal)) return false;
JS_SetGCZeal(cx, uint8_t(zeal), JS_DEFAULT_ZEAL_FREQ);
return true;
}
#endif
#ifdef ANDROID
static bool ChangeTestShellDir(JSContext* cx, unsigned argc, Value* vp) {
// This method should only be used by testing/xpcshell/head.js to change to
// the correct directory on Android Remote XPCShell tests.
//
// identical methods in XPCShellEnvironment and XPCShellImpl to chdir on
// android for Remote XPCShell tests on Android.
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() != 1) {
JS_ReportErrorASCII(cx, "changeTestShellDir() takes one argument");
return false;
}
nsAutoJSCString path;
if (!path.init(cx, args[0])) {
JS_ReportErrorASCII(
cx, "changeTestShellDir(): could not convert argument 1 to string");
return false;
}
if (chdir(path.get())) {
JS_ReportErrorASCII(cx, "changeTestShellDir(): could not change directory");
return false;
}
return true;
}
#endif
const JSFunctionSpec gGlobalFunctions[] = {
JS_FN("print", Print, 0, 0),
JS_FN("load", Load, 1, 0),
JS_FN("quit", Quit, 0, 0),
JS_FN("dumpXPC", DumpXPC, 1, 0),
JS_FN("dump", Dump, 1, 0),
JS_FN("gc", GC, 0, 0),
#ifdef JS_GC_ZEAL
JS_FN("gczeal", GCZeal, 1, 0),
#endif
#ifdef ANDROID
JS_FN("changeTestShellDir", ChangeTestShellDir, 1, 0),
#endif
JS_FS_END};
typedef enum JSShellErrNum {
#define MSG_DEF(name, number, count, exception, format) name = number,
#include "jsshell.msg"
#undef MSG_DEF
JSShellErr_Limit
#undef MSGDEF
} JSShellErrNum;
} /* anonymous namespace */
void XPCShellEnvironment::ProcessFile(JSContext* cx, const char* filename,
FILE* file, bool forceTTY) {
XPCShellEnvironment* env = this;
JS::Rooted<JS::Value> result(cx);
int lineno, startline;
bool ok, hitEOF;
char *bufp, buffer[4096];
JSString* str;
JS::Rooted<JSObject*> global(cx, JS::CurrentGlobalOrNull(cx));
MOZ_ASSERT(global);
if (forceTTY) {
file = stdin;
} else if (!isatty(fileno(file))) {
/*
* It's not interactive - just execute it.
*
* Support the UNIX #! shell hack; gobble the first line if it starts
* with '#'.
*/
int ch = fgetc(file);
if (ch == '#') {
while ((ch = fgetc(file)) != EOF) {
if (ch == '\n' || ch == '\r') break;
}
}
ungetc(ch, file);
JS::CompileOptions options(cx);
options.setFileAndLine(filename, 1);
JS::Rooted<JSScript*> script(cx, JS::CompileUtf8File(cx, options, file));
if (script) {
(void)JS_ExecuteScript(cx, script, &result);
}
return;
}
/* It's an interactive filehandle; drop into read-eval-print loop. */
lineno = 1;
hitEOF = false;
do {
bufp = buffer;
*bufp = '\0';
/*
* Accumulate lines until we get a 'compilable unit' - one that either
* generates an error (before running out of source) or that compiles
* cleanly. This should be whenever we get a complete statement that
* coincides with the end of a line.
*/
startline = lineno;
do {
if (!GetLine(bufp, file, startline == lineno ? "js> " : "")) {
hitEOF = true;
break;
}
bufp += strlen(bufp);
lineno++;
} while (
!JS_Utf8BufferIsCompilableUnit(cx, global, buffer, strlen(buffer)));
/* Clear any pending exception from previous failed compiles. */
JS_ClearPendingException(cx);
JS::CompileOptions options(cx);
options.setFileAndLine("typein", startline);
JS::SourceText<mozilla::Utf8Unit> srcBuf;
JS::Rooted<JSScript*> script(cx);
if (srcBuf.init(cx, buffer, strlen(buffer),
JS::SourceOwnership::Borrowed) &&
(script = JS::Compile(cx, options, srcBuf))) {
ok = JS_ExecuteScript(cx, script, &result);
if (ok && !result.isUndefined()) {
/* Suppress warnings from JS::ToString(). */
JS::AutoSuppressWarningReporter suppressWarnings(cx);
str = JS::ToString(cx, result);
JS::UniqueChars bytes;
if (str) bytes = JS_EncodeStringToLatin1(cx, str);
if (!!bytes)
fprintf(stdout, "%s\n", bytes.get());
else
ok = false;
}
}
} while (!hitEOF && !env->IsQuitting());
fprintf(stdout, "\n");
}
// static
XPCShellEnvironment* XPCShellEnvironment::CreateEnvironment() {
auto* env = new XPCShellEnvironment();
if (env && !env->Init()) {
delete env;
env = nullptr;
}
return env;
}
XPCShellEnvironment::XPCShellEnvironment() : mQuitting(false) {}
XPCShellEnvironment::~XPCShellEnvironment() {
if (GetGlobalObject()) {
AutoJSAPI jsapi;
if (!jsapi.Init(GetGlobalObject())) {
return;
}
JS_SetAllNonReservedSlotsToUndefined(mGlobalHolder);
mGlobalHolder.reset();
JS_GC(jsapi.cx());
}
}
bool XPCShellEnvironment::Init() {
nsresult rv;
// unbuffer stdout so that output is in the correct order; note that stderr
// is unbuffered by default
setbuf(stdout, 0);
AutoSafeJSContext cx;
mGlobalHolder.init(cx);
nsCOMPtr<nsIPrincipal> principal;
nsCOMPtr<nsIScriptSecurityManager> securityManager =
do_GetService(NS_SCRIPTSECURITYMANAGER_CONTRACTID, &rv);
if (NS_SUCCEEDED(rv) && securityManager) {
rv = securityManager->GetSystemPrincipal(getter_AddRefs(principal));
if (NS_FAILED(rv)) {
fprintf(stderr,
"+++ Failed to obtain SystemPrincipal from ScriptSecurityManager "
"service.\n");
}
} else {
fprintf(stderr,
"+++ Failed to get ScriptSecurityManager service, running without "
"principals");
}
auto backstagePass = MakeRefPtr<BackstagePass>();
JS::RealmOptions options;
options.creationOptions().setNewCompartmentInSystemZone();
xpc::SetPrefableRealmOptions(options);
JS::Rooted<JSObject*> globalObj(cx);
rv = xpc::InitClassesWithNewWrappedGlobal(
cx, static_cast<nsIGlobalObject*>(backstagePass), principal, 0, options,
&globalObj);
if (NS_FAILED(rv)) {
NS_ERROR("InitClassesWithNewWrappedGlobal failed!");
return false;
}
if (!globalObj) {
NS_ERROR("Failed to get global JSObject!");
return false;
}
JSAutoRealm ar(cx, globalObj);
backstagePass->SetGlobalObject(globalObj);
JS::Rooted<Value> privateVal(cx, PrivateValue(this));
if (!JS_DefineProperty(cx, globalObj, "__XPCShellEnvironment", privateVal,
JSPROP_READONLY | JSPROP_PERMANENT) ||
!JS_DefineFunctions(cx, globalObj, gGlobalFunctions)) {
NS_ERROR("JS_DefineFunctions failed!");
return false;
}
mGlobalHolder = globalObj;
FILE* runtimeScriptFile = fopen(kDefaultRuntimeScriptFilename, "r");
if (runtimeScriptFile) {
fprintf(stdout, "[loading '%s'...]\n", kDefaultRuntimeScriptFilename);
ProcessFile(cx, kDefaultRuntimeScriptFilename, runtimeScriptFile, false);
fclose(runtimeScriptFile);
}
return true;
}
bool XPCShellEnvironment::EvaluateString(const nsAString& aString,
nsString* aResult) {
AutoEntryScript aes(GetGlobalObject(),
"ipc XPCShellEnvironment::EvaluateString");
JSContext* cx = aes.cx();
JS::CompileOptions options(cx);
options.setFileAndLine("typein", 0);
JS::SourceText<char16_t> srcBuf;
if (!srcBuf.init(cx, aString.BeginReading(), aString.Length(),
JS::SourceOwnership::Borrowed)) {
return false;
}
JS::Rooted<JSScript*> script(cx, JS::Compile(cx, options, srcBuf));
if (!script) {
return false;
}
if (aResult) {
aResult->Truncate();
}
JS::Rooted<JS::Value> result(cx);
bool ok = JS_ExecuteScript(cx, script, &result);
if (ok && !result.isUndefined()) {
/* Suppress warnings from JS::ToString(). */
JS::AutoSuppressWarningReporter suppressWarnings(cx);
JSString* str = JS::ToString(cx, result);
nsAutoJSString autoStr;
if (str) autoStr.init(cx, str);
if (!autoStr.IsEmpty() && aResult) {
aResult->Assign(autoStr);
}
}
return true;
}